Hi ,
I have executed load.FlowRemovedLload github scripts in Openvswitch and its
getting failed with this intermittent error .
"Dropped 175 messages in last 1 seconds due to excessive rate"
Openvswitch version : openvswitch - 2.3.1
OS version : Ubuntu 14.04 Ttusty
Open flow version : 1.0
And the same script passed without adding /deleting in the script with
Openflow switch.
PFA script details attached .
Kindly let me know your inputs on the same.
Thanks
Jayachandran S
+91-8861883300
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class FlowRemovedLoad(base_tests.SimpleDataPlane):
"""
Generate lots of flow-removed messages
We keep track of the number of flow-removed messages we get but do not
assert on it. The goal of this test is just to make sure the controller
stays connected.
"""
def checkBarrier(self):
msg, pkt = self.controller.transact(ofp.message.barrier_request(),
timeout=60)
self.assertNotEqual(msg, None, "Barrier failed")
while self.controller.packets:
msg = self.controller.packets.pop(0)[0]
self.assertNotEqual(msg.type, "Error received")
def runTest(self):
delete_all_flows(self.controller)
self.checkBarrier()
msg, _ = self.controller.transact(ofp.message.table_stats_request())
# Some switches report an extremely high max_entries that would cause
# us to run out of memory attempting to create all the flow-mods.
num_flows = min(msg.entries[0].max_entries, 32678)
logging.info("Creating %d flow-mods messages", num_flows)
requests = []
for i in range(num_flows):
match = ofp.match()
match.wildcards = ofp.OFPFW_ALL & ~ofp.OFPFW_DL_VLAN &
~ofp.OFPFW_DL_DST
match.vlan_vid = ofp.OFP_VLAN_NONE
match.eth_dst = [0, 1, 2, 3, i / 256, i % 256]
act = ofp.action.output()
act.port = ofp.OFPP_CONTROLLER
request = ofp.message.flow_add()
request.buffer_id = 0xffffffff
request.priority = num_flows - i
request.out_port = ofp.OFPP_NONE
request.flags = ofp.OFPFF_SEND_FLOW_REM
request.match = match
request.actions.append(act)
requests.append(request)
logging.info("Adding %d flows", num_flows)
random.shuffle(requests)
for request in requests:
self.controller.message_send(request)
self.checkBarrier()
# Trigger a flood of flow-removed messages
delete_all_flows(self.controller, send_barrier=False)
count = 0
while True:
(response, raw) = self.controller.poll(ofp.OFPT_FLOW_REMOVED)
if not response:
break
count += 1
# Make sure the switch is still connected
self.checkBarrier()
logging.info("FlowRemovedLoad got %d/%d flow_removed messages." %
(count, num_flows))
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